This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Specific Heat Ratio Model for Single-Zone Heat Release Models
Technical Paper
2004-01-1464
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The objective is to investigate models of the specific heat ratio for the single-zone heat release model, and find a model accurate enough to introduce a modeling error less than or in the order of the cylinder pressure measurement noise, while keeping the computational complexity at a minimum. Based on assumptions of frozen mixture for the unburned mixture and chemical equilibrium for the burned mixture, the specific heat ratio is calculated using a full equilibrium program for an unburned and a burned air-fuel mixture, and compared to already existing and newly proposed approximative models of γ.
A two-zone mean temperature model, Matekunas pressure ratio management and the Vibe function are used to parameterize the mass fraction burned. The mass fraction burned is used to interpolate the specific heats for the unburned and burned mixture, and then form the specific heat ratio, which renders a small enough modeling error in γ. The specific heats for the unburned mixture is captured within 0.2 % by a linear function, and the specific heats for the burned mixture is captured within 1 % by a higher-order polynomial for the major operating range of a spark ignited (SI) engine.
Recommended Content
Authors
Citation
Klein, M. and Eriksson, L., "A Specific Heat Ratio Model for Single-Zone Heat Release Models," SAE Technical Paper 2004-01-1464, 2004, https://doi.org/10.4271/2004-01-1464.Also In
References
- Gatowski J.A. Balles E.N. Chun K.M. Nelson F.E. Ekchian J.A. Heywood J.B. Heat release analysis of engine pressure data 1984 SAE Technical Paper 841359
- Chun K. M. Heywood J. B. Estimating heat-release and mass-of-mixture burned from spark-ignition engine pressure data Combustion Sci. and Tech. 54 133 143 1987
- Guezennec Y.G. Hamama W. Two-zone heat release analysis of combustion data and calibration of heat transfer correlation in an I.C. engine 1999 SAE Technical paper 1999-01-0218
- Ljung L. System Identification Theory for the User Prentice Hall 2nd 1999
- Eriksson L. Documentation for the chemical equilibrium program package chepp Technical Report LiTH-R-2298 1400-3902 Department of Electrical Engineering, Link¨oping University S-581 83 Linköping, Sweden 2000
- Brunt M.F.J. Rai A. Emtage A.L. The calculation of heat release energy from engine cylinder pressure data SI Engine Combustion 1998 SAE Technical Paper 981052
- Krieger R.B. Borman G.L. The computation of apparent heat release for internal combustion engines ASME 1967
- Çengel Y.A. Boles M.A. Thermodynamics: An Engineering Approach McGraw-Hill 4th 2002 http://highered.mcgraw-hill.com
- Gustafsson F. Adaptive Filtering and Change Detection Wiley 2000
- Matekunas F.A. Modes and measures of cyclic combustion variability 1983 SAE Technical Paper 830337
- Andersson I. Cylinder pressure and ionization current modeling for spark ignited engines Technical report, Vehicular Systems 2002
- Stone R. Introduction to Internal Combustion Engines SAE International 3rd 1999
- Heywood J. B. Internal Combustion Engine Fundamentals McGraw-Hill series in mechanical engineering. McGraw-Hill 1988
- Nilsson Y. Eriksson L. A new formulation of multi-zone combustion engine models IFAC Workshop: Advances in Automotive Control 629 634 Karlsruhe, Germany 2001
- Eriksson L. Spark Advance Modeling and Control Linköping University May 1999 91-7219-479-0 0345-7524
- Vibe I.I. Brennverlauf und Kreisprocess von Verben-nungsmotoren 1970